height = 1.75
weight = 90
BMI = weight / (height * height)
if BMI < 18.5:
    print('过轻')
elif BMI <= 25:
    print('正常')
elif BMI <= 28:
    print('过重')
elif BMI <= 32:
    print('肥胖')
else:
    print('严重肥胖')
